Nokia 1.4 Imei Repair |link| -

IMEI is a 15-digit number that uniquely identifies a mobile device. It's used by the network provider to identify a device on their network and can be used to block a device from accessing the network if it's reported stolen.

A failed firmware update or a hard reset gone wrong can lead to a "Null" or "Unknown" baseband/IMEI, effectively turning the phone into a Wi-Fi-only tablet because it cannot authenticate with cellular towers. nokia 1.4 imei repair